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Disk Libraries - Frequently Asked Questions

Table of Contents

What are the permission needed to create a Disk Library?

How do I include the CV_Magnetic folder in the backup operations?

What is the default chunk size and block size to read or write data from disk libraries?

Can I create a disk library using SMB3 for Windows 2012?

Can I create a disk library using ReFS for Windows 2012?

What are the recommended settings for EMC® Data Domain® disk libraries?

Can I configure Data Domain Boost (DD Boost) on Disk Libraries using EMC® Data Domain®?

What are the recommended settings for Dell EMC Isilon disk libraries running OneFS?

What are the permission needed to create a Disk Library?

The user account used to access the mount path must have read /write permissions on the mount path.

If an UNC path is used as a mount path, the user account must have read/write permission to the software install folder. See Using a UNC Path as a Mount Path for more details.

How do I include the CV_Magnetic folder in the backup operations?

The CV_MAGNETIC folder (which is created when a mount path is configured) is, by default, excluded from backup operations if a MediaAgent and the Windows File System iDataAgent are installed on a computer. The CV_MAGNETIC folder must be associated with the MediaAgent that is installed on the computer.

To include this folder in backup operations:

  1. From the CommCell Browser, expand to Storage Resources | MediaAgents.
  2. Right-click the appropriate MediaAgent, and then click Properties.
  3. Click the Additional Settings tab.
  4. Click Add.
  5. In the Name box, type nDoNotFilterGalaxyMagneticMountPaths, and then press Enter.

    The values for all fields fill automatically.

  6. In the Value box, type 1.
  7. Click OK.
  8. Click OK.

What is the default chunk size and block size to read or write data from disk libraries?

By default, the system uses 4 GB as the chunk size and 64 KB as the block size to read/write data from disk libraries. If necessary, you can change these values in the Data Path Properties dialog box for each data path. Access the Data Path Properties dialog box from the Data Paths tab of the Copy Properties dialog box for the selected data path. For more information about using chunk and block sizes, see Performance Tuning.

Can I create a disk library using SMB3 for Windows 2012?

Yes, you can create a disk library using SMB3 on Windows 2012.

After you create a disk library, make sure to select the Prevent accidental deletion of data from mountpaths check boxto protect your mount path contents from being deleted accidentally from outside of the CommCell Console. See Prevent Accidentally Deleting the Contents of a Mount Path for more information.

Can I create a disk library using ReFS for Windows 2012?

Yes, you can create a disk library using ReFS on Windows 2012 and Windows 2016.

What are the recommended settings for EMC® Data Domain® disk libraries?

Commvault works best with EMC Data Domain disk libraries if you minimize how often Commvault accesses the disk library.

Apply the following recommended settings to each MediaAgent associated with the disk library:

Prevent Data Pruning During Peak Backup Times

This procedure prevents physical pruning of data during peak backup times. However, it provides enough time for pruning to run outside of the peak times so that the disk library does not run out of space. After the additional setting is configured, no new data pruning request will be honored. However, if any pruning operation is already in progress, then this additional setting will not stop that process.

Note: The following setting impacts all the libraries in the CommCell. For a more granular control of a specific library you can disable data pruning at the MediaAgent level. For more information on controlling the data pruning at the MediaAgent level, see Enable or Disable Data Pruning.

  1. From the CommCell Browser, right-click the CommServe node, and then click Properties.
  2. On the Additional Settings tab of the CommCell Properties dialog box, click Add.
  3. In the Add Additional Settings dialog box, enter the following:
    1. In the Name box, type sMMDoNotPruneInterval.

      The Category and Type details fill automatically.

    2. In the Value box, enter the appropriate time interval in hours.

      For example:

      To prevent pruning from 10:00 AM to 12:00 PM, and from 8:00 PM to 11:00 PM type 10-12, 20-23.

      To prevent pruning from 6:00 PM to 7:00 AM the next day, type 18-7.

    3. Click OK.
  4. Click OK.

Minimize the Number of Volumes on the MediaAgent and the Frequency of Volume Size Updates

  1. On the ribbon in the CommCell Console, click the Storage tab, and then click Media Management.

    The Media Management Configuration dialog box appears.

  2. On the Service Configuration tab, set both of the following parameters:

    Note: If you have upgraded from V 9.0 to the current version, the Interval between volume size update requests and the Number of volumes for size update parameters are available on the Data Aging tab.

    • For Number of volumes for size update, type 50.

      You can use a value other than 50, but it should be a small value.

    • For Interval between volume size update requests, type 2880.

      The value 2880 minutes = 2 days.

  3. Click OK.

Prevent SMB/CIFS Session Leaks on the Windows Operating System

In addition to the recommended settings for each MediaAgent, consult the following Microsoft Knowledge Base article:

"SMB/CIFS sessions leak in Windows Vista, in Windows Server 2008, in Windows 7 and in Windows Server 2008 R2", http://support.microsoft.com/kb/2537589

Setup the Necessary Permissions for Accessing NFS Exports

While using data domain storage as NFS exports, enable the Map root users to anonymous UID/GID (root_squash) option from the DataDomain Console as shown in the following image:

This will prevent Auxiliary Copy and Data Aging jobs running on the Data Domain mount path from failing with 'permission denied' errors.

Can I configure Data Domain Boost (DD Boost) on Disk Libraries using EMC® Data Domain®?

Yes, Data Domain Boost on Data Domain physical boxes and Data Domain Virtual Edition is supported on Windows and Linux MediaAgents.

Configuration - Linux

Use the following steps to make sure that the device is mounted in the MediaAgent, before configuring the library.

Note: The product was tested using Red Hat Enterprise Linux Server release 6.5 (Santiago) with Kernel Version: 2.6.32-431.el6.x86_64*.

  1. Install the FUSE File system and its dependencies on the MediaAgent. (The product was tested using FUSE version: fuse-2.8.3-4.el6.x86_64.rpm*.)

    Note: Make sure that the FUSE version is compatible with the DD Boost File system version.

  2. Install the DD Boost file system RPM on the MediaAgent. (The product was tested using DD Boost file system versions: DDBoostFS-1.0.0.1-539441.rhel.x86_64.rpm and DDBoostFS-1.0.0.2-542445.rhel.x86_64.rpm*.)

    You can verify the installation from the following location:

    /opt/emc/boostfs

  3. Run the following commands from the following location:

    /opt/emc/boostfs/bin

    Set the lock box between the Data Domain storage unit and MediaAgent using the following command:

    boostfs lockbox set -s <Storage-unit> -d <data-domain-system> -u <storage-unit-username>

    Mount this storage unit on the MediaAgent using the following command:

    boostfs mount -d <data-domain-system> -s <Storage-unit> <mount-point>

  4. Configure a disk library using the above storage unit mount point as the mount path for the library.

* If you have a different version, contact Commvault customer support to verify compatibility.

Configuration - Windows

Use the following steps to make sure that the device is mounted in the MediaAgent, before configuring the library.

  1. Install the BoostFS on the MediaAgent.
  2. Run the following commands to configure the lock box.

    boostfs lockbox set -u sysadmin -d <DD Boost-IP> -s <Storage-unit> -l <lock-box-location>

    For example:

    C:\Windows\system32>boostfs lockbox set -u sysadmin -d 111.11.11.11 -s MyStorage -l C:\Boostfs\Lockbox\boostfs.lockbox
    Enter storage unit user password:
    Enter storage unit user password again to confirm:
    Lockbox entry set

  3. Run the following command to mount the Storage Unit from EMC.

    boostfs mount -d <DD Boost-IP> -s <Storage-unit> -l <lock-box-location>

    For example:

    C:\Windows\system32>boostfs mount -d 111.11.11.11 -s MyStorage -l C:\Boostfs\Lockbox\boostfs.lockbox

  4. Configure a disk library using the storage unit mount point as the mount path for the library.

Known Issues

When you backup data to the Data Domain Virtual Edition, the post compression space is reported incorrectly.

What are the recommended settings for Dell EMC Isilon disk libraries running OneFS?

Commvault offers the following support information only as guidelines for hosting Isilon disk devices on a MediaAgent.

  • For more information on the supported versions, see the Isilon Supportability and Compatibility Guide, on the Dell EMC Support Web site at https://support.emc.com/.
  • For questions regarding the support of device software, operating system levels, and the Server Message Block (SMB) protocol, contact Dell EMC or Microsoft support.

Supported Isilon OneFS Versions

  • Isilon OneFS version 7.2 and higher

Supported SMB Versions for Windows Server

EMC and Microsoft support the following Server Message Block (SMB) protocol versions.

Microsoft Windows Server version

SMB 1

SMB 2

SMB 2.1

SMB 3

SMB 3.02

2000

 

 

 

 

2003

 

 

 

 

2003 R2

 

 

 

 

2008

 

 

 

2008 R2

 

 

2012

 

2012 R2

Important: SMB 2.1 applies caching of folders or file properties or directory leasing related to the Opportunistic Locking (oplock) leasing model. For other disk array hardware vendors and devices, contact the appropriate hardware vendor for its best practices regarding SMB and Opportunistic Locking.

Last modified: 12/21/2017 3:07:35 PM